Hydrogen adsorption in ordered mesoporous carbon synthesized by a soft-template approach

Dipendu Saha, Zuojun Wei, Sri H. Valluri, Shuguang Deng

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

An ordered mesoporous carbon was synthesized with soft-template approach as a potential adsorbent for hydrogen storage through physical adsorption. The carbon adsorbent prepared in this work has a Brunauer-Emmett-Teller (BET) specific surface area of 798 m2/g, uniform pore size distribution with an average pore diameter of 6.26 nm, and pore volume of 0.87 cm 3/g. Hydrogen adsorption equilibrium and kinetics in the carbon adsorbent were measured in a volumetric adsorption apparatus at 77,194.5, and 298 K. A hydrogen adsorption capacity of 1.27 wt % was observed at 1.05 bar and 77 K, hydrogen diffusivity in the carbon is estimated to be 1 × 10 -6 cm2/s at 194.5 K, and activation energy for hydrogen diffusion in the carbon is 0.236 kJ/mol. The isosteric heat of adsorption for hydrogen in the carbon adsorbent is between 3 and 6 kJ/mol, which is in the same range of the heat of adsorption of hydrogen measured on other carbonaceous materials.

Original languageEnglish (US)
Pages (from-to)39-50
Number of pages12
JournalJournal of Porous Media
Volume13
Issue number1
DOIs
StatePublished - 2010

Keywords

  • Equilibrium
  • H adsorption
  • Isosteric heat of adsorption
  • Kinetics
  • Ordered mesoporous carbon
  • Soft template

ASJC Scopus subject areas

  • Modeling and Simulation
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Hydrogen adsorption in ordered mesoporous carbon synthesized by a soft-template approach'. Together they form a unique fingerprint.

  • Cite this